<!doctype html>
<meta charset="UTF-8">
<title>CSS-contain test: style containment and subtree root</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://drafts.csswg.org/css-contain-2/#property-scoped-to-a-sub-tree">
<link rel="match" href="reference/counter-scoping-004-ref.html">
<style>
  .list-item {
    contain: style;
    counter-increment: my-list-counter;
    margin-left: 40px;
  }
  .list-item::before {
    content: '[' counter(my-list-counter, decimal) '] ';
  }
</style>
<div class="list-item">
  A1
  <div class="list-item">B1</div>
  <div class="list-item">B2</div>
</div>
<div class="list-item">A2</div>
<div class="list-item">A3</div>
